R. Zernecke
Seasonal Variations in Height demonstrated at the Radiotelescope Reference Point
 
                   ABSTRACT
 
 
Due to thermal expansion the height of a radiotelescope shows daily and
seasonal variations. Since February 26, 1997 the height variations of the
reference point are continuously monitored. The maximum of variation is
up to 1 mm during a day and more than 3 mm a year, which is regarding
the precision of VLBI not negligible.
 
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In Proceedings of the 13th Working Meeting on European VLBI for Geodesy
and Astrometry, Viechtach, 1999
 
Keywords: height variations, Wettzell, radiotelescope, invar measuring system